/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 *
 * @format
 * @flow
 */

import React, {Component} from 'react';
import {Platform, StyleSheet, Button, View, NativeModules, PermissionsAndroid } from 'react-native';

const instructions = Platform.select({
  ios: 'Press Cmd+R to reload,\n' + 'Cmd+D or shake for dev menu',
  android:
    'Double tap R on your keyboard to reload,\n' +
    'Shake or press menu button for dev menu',
});

type Props = {};
async function requestCameraPermission() {
  try {
    const granted = await PermissionsAndroid.request(
      PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION,
      {
        'title': '位置信息',
        'message': '需要知道手机的位置信息?'
      }
    )
    if (granted === PermissionsAndroid.RESULTS.GRANTED) {
      console.log("可以使用位置信息")
    } else {
      console.log("被拒绝使用位置信息")
    }
  } catch (err) {
    console.warn(err)
  }
}
export default class App extends Component<Props> {

  onPress = () => {
    NativeModules.ToastExample.show('调用原生Toast方法显示的内容！', NativeModules.ToastExample.SHORT);
  }
  render() {
    requestCameraPermission();
    return (
      <View style={styles.container}>
        <Button onPress={this.onPress} title='安卓原生Toast调用' />
      </View>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  },
  welcome: {
    fontSize: 20,
    textAlign: 'center',
    margin: 10,
  },
  instructions: {
    textAlign: 'center',
    color: '#333333',
    marginBottom: 5,
  },
});
